How to fix apt-get GPG error NO_PUBKEY Ubuntu 14

juraganet June 12, 2014
apt-get-gpg-error

GPG error NO_PUBKEY

This morning when I do apt-get update on my new Ubuntu 14.04 server, I got these error messages:

Reading package lists… Done
W: GPG error: http://security.ubuntu.com trusty-security Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://archive.canonical.com trusty Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://archive.ubuntu.com trusty Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://archive.ubuntu.com trusty-updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32

After did some small research on Google, I found a way to overcome this GPG NO_PUBKEY error by downloading the missing key using apt-key tools. The command is as follow:

Command result:

Second command:

Result:

Notice that code 40976EAF437D05B5 and 3B4FE6ACC0B21F32 was taken from the error messages above.

Now you can do apt-get update again and you should have no error anymore.

Apt-Get Repositories fix offer
If you don’t have time to do all of this stuff, or if this is not your area of expertise, we offer a service to fix apt-get repositories, starting from $5 (Paypal payment). Please contact us to get a best deal!

Share on Google+0Share on Facebook0Tweet about this on TwitterShare on Tumblr0Share on StumbleUpon0Share on Reddit0Pin on Pinterest0

Leave a Comment